Rails 6 测试的问题

Question

I am using ruby 2.7 and Rails version 6.0.2.1 When I try to test my model I get this message

Error:
OfferTest#test_valid_offer:
DRb::DRbRemoteError: PG::UndefinedTable: ERROR:  relation "views" does not exist
LINE 8:  WHERE a.attrelid = '"views"'::regclass
                            ^
 (ActiveRecord::StatementInvalid)

rails test test/models/offer_test.rb:4

This is my schema file:

ActiveRecord::Schema.define(version: 2020_01_20_105655) do

  # These are extensions that must be enabled in order to support this database
  enable_extension "plpgsql"

  create_table "offers", force: :cascade do |t|
    t.string "city"
    t.string "area"
    t.string "address"
    t.string "contact_person"
    t.string "contact_person_phone"
    t.string "denomination"
    t.string "category"
    t.string "typology"
    t.integer "guests"
    t.integer "rooms"
    t.boolean "lift"
    t.decimal "expense"
    t.datetime "created_at", precision: 6, null: false
    t.datetime "updated_at", precision: 6, null: false
  end

  create_table "requests", force: :cascade do |t|
    t.string "name"
    t.string "last_name"
    t.string "address"
    t.decimal "budget"
    t.date "date_of_request"
    t.string "document_id"
    t.string "phone"
    t.string "residential_address"
    t.date "date_of_birth"
    t.string "notes"
    t.datetime "created_at", precision: 6, null: false
    t.datetime "updated_at", precision: 6, null: false
  end

  create_table "users", force: :cascade do |t|
    t.string "name", null: false
    t.string "last_name", null: false
    t.string "email", default: "", null: false
    t.string "encrypted_password", default: "", null: false
    t.string "reset_password_token"
    t.datetime "reset_password_sent_at"
    t.datetime "remember_created_at"
    t.datetime "created_at", precision: 6, null: false
    t.datetime "updated_at", precision: 6, null: false
    t.index ["email"], name: "index_users_on_email", unique: true
    t.index ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true
  end

end

Ad of now I have 3 tables. I am testing the Offer model but I get this strange behaviour. This is my test model code

require 'test_helper'

class OfferTest < ActiveSupport::TestCase
  test "valid offer" do
    offer = Offer.new(city: "Rome", area: "Zona Sud", address: "Via Roma")
  end
end

I've already run rails db:test:prepare but I cannot fix this issue.

Answer 1

My initial thought is that some gem is injecting behaviour into your models.

Something is expecting a table "views". The name views hints at either a gem using database views to virtualize tables, or some gem that works in the domain with views : for example a gem for statistics (An order has been viewed 21 times: has 21 views).

I'd suggest removing all gems from your gemfile and re-including them one by one. This will tell you what gem is injecting this behaviour: knowing what your dependencies do is an important part of building an app, IMO.

If it is a gem, that gem most probably has some migrations that you need to install and run:

bundle exec rake railties:install:migrations
bundle exec rake db:migrate